Question

Net charge on object having 9 x 1013 protons and 6 x 1013 electrons is
(A) – 4.8 uc
(B) 4.8 MC
(C) 4.8 C
(D) 3 x 1.6 x 10-19 C
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Answer 1

Answer:

Charge on 1 proton =1.6*10^-19

charge on 9*10^13= 1.6*10^-19 * 9*10^13 = 14.4 * 10^-6

Similarly

Charge on 1 electron = -1.6*10^-19

charge on 6*10^13= - 1.6*10^-19 * 6*10^13= -9.6*10^-6

Net charge= Charge of electron + Charge of proton

= -9.6*10^-6 + 14.4*10^-6

= 4.8 columb

Correct option is C

Answer 2

Answer :

(B) 4.8 micro coulomb

Explanation :

see the attached photo ...

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